coredns-redis

coredns-redis uses redis as a backend for coredns
this plugin should be located right next to etcd in plugins.cfg:

...
secondary:secondary
etcd:etcd
redis:github.com/rverst/coredns-redis/plugin
loop:loop
forward:forward
grpc:grpc
...

configuration

{
  redis {
    address HOST:PORT
    username USER
    password PASSWORD
    connect_timeout TIME_MS
    read_timeout TIME_MS
    ttl TIME_S
    prefix PREFIX
    suffix SUFFIX
  }
}

• address is the address of the redis backend in form of host:port (defaults to localhost:6379)
• username is the username for connectiong to the redis backend (optional)
• password is the redis password (optional)
• connect_timeout maximum time to establish a connection to the redis backend (in ms, optional)
• read_timeout maximum time to wait for the redis backend to respond (in ms, optional)
• ttl default ttl for dns records which have no ttl set (in seconds, default 3600)
• prefix a prefix added to all redis keys
• suffix a suffix added to all redis keys

example

corefile:

{
  .{
    redis {
      address localhost:6379
      username redis_user
      password super_secret
      connect_timeout 2000
      read_timeout 2000
      ttl 300
      prefix DNS_
      suffix _DNS
    }
  }
}

reverse zones

not yet supported

proxy

not yet supported

API

Package redis provides functions to manipulate (get, add, edit, delete) the data in the redis backend. The DNS zones are saved as hashmaps with the zone-name as key in the backend. While the data format is JSON at the moment, but I am considering switching to protobuf for performance reasons later.

credits

this plugin started as a fork of github.com/arvancloud/redis.